Gearing/info seeking

[ynot]

3.70, or 3.73's depending on who makes your rears, sitting on 11r22.5 would do great but those are more of a 60-64mph gears, 3.55 would prob be more suited too your speed range, but switching from 3.36 too 3.55 is kinda pricey for the small gains unless they are needing a rebuild anyway

I'd slow down an start running split back in 12th get the rpms up a bit should help some with at speed pulling power, the other thing I'd do is next tire change drop down too low pro's that'll bump your gear ratio up close too 3.55's